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-rw-r--r--src/mesa/drivers/dri/common/xmlconfig.c1002
1 files changed, 1002 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/common/xmlconfig.c b/src/mesa/drivers/dri/common/xmlconfig.c
new file mode 100644
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--- /dev/null
+++ b/src/mesa/drivers/dri/common/xmlconfig.c
@@ -0,0 +1,1002 @@
+/*
+ * XML DRI client-side driver configuration
+ * Copyright (C) 2003 Felix Kuehling
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * FELIX KUEHLING, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
+ * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+/**
+ * \file xmlconfig.c
+ * \brief Driver-independent client-side part of the XML configuration
+ * \author Felix Kuehling
+ */
+
+#include "glheader.h"
+
+#include <string.h>
+#include <assert.h>
+#include <expat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include "imports.h"
+#include "dri_util.h"
+#include "xmlconfig.h"
+
+/*
+ * OS dependent ways of getting the name of the running program
+ */
+#if (defined(__unix__) || defined(unix)) && !defined(USG)
+#include <sys/param.h>
+#endif
+
+#undef GET_PROGRAM_NAME
+
+#if (defined(__GNU_LIBRARY__) || defined(__GLIBC__)) && !defined(__UCLIBC__)
+# if !defined(__GLIBC__) || (__GLIBC__ < 2)
+/* These aren't declared in any libc5 header */
+extern char *program_invocation_name, *program_invocation_short_name;
+# endif
+# define GET_PROGRAM_NAME() program_invocation_short_name
+#elif defined(__FreeBSD__) && (__FreeBSD__ >= 2)
+# include <osreldate.h>
+# if (__FreeBSD_version >= 440000)
+# include <stdlib.h>
+# define GET_PROGRAM_NAME() getprogname()
+# endif
+#elif defined(__NetBSD__) && defined(__NetBSD_Version) && (__NetBSD_Version >= 106000100)
+# include <stdlib.h>
+# define GET_PROGRAM_NAME() getprogname()
+#endif
+
+#if !defined(GET_PROGRAM_NAME)
+# if defined(OpenBSD) || defined(NetBSD) || defined(__UCLIBC__)
+/* This is a hack. It's said to work on OpenBSD, NetBSD and GNU.
+ * Rogelio M.Serrano Jr. reported it's also working with UCLIBC. It's
+ * used as a last resort, if there is no documented facility available. */
+static const char *__getProgramName () {
+ extern const char *__progname;
+ char * arg = strrchr(__progname, '/');
+ if (arg)
+ return arg+1;
+ else
+ return __progname;
+}
+# define GET_PROGRAM_NAME() __getProgramName()
+# else
+# define GET_PROGRAM_NAME() ""
+# warning "Per application configuration won't work with your OS version."
+# endif
+#endif
+
+/** \brief Find an option in an option cache with the name as key */
+static GLuint findOption (const driOptionCache *cache, const char *name) {
+ GLuint len = strlen (name);
+ GLuint size = 1 << cache->tableSize, mask = size - 1;
+ GLuint hash = 0;
+ GLuint i, shift;
+
+ /* compute a hash from the variable length name */
+ for (i = 0, shift = 0; i < len; ++i, shift = (shift+8) & 31)
+ hash += (GLuint)name[i] << shift;
+ hash *= hash;
+ hash = (hash >> (16-cache->tableSize/2)) & mask;
+
+ /* this is just the starting point of the linear search for the option */
+ for (i = 0; i < size; ++i, hash = (hash+1) & mask) {
+ /* if we hit an empty entry then the option is not defined (yet) */
+ if (cache->info[hash].name == 0)
+ break;
+ else if (!strcmp (name, cache->info[hash].name))
+ break;
+ }
+ /* this assertion fails if the hash table is full */
+ assert (i < size);
+
+ return hash;
+}
+
+/** \brief Count the real number of options in an option cache */
+static GLuint countOptions (const driOptionCache *cache) {
+ GLuint size = 1 << cache->tableSize;
+ GLuint i, count = 0;
+ for (i = 0; i < size; ++i)
+ if (cache->info[i].name)
+ count++;
+ return count;
+}
+
+/** \brief Like strdup but using MALLOC and with error checking. */
+#define XSTRDUP(dest,source) do { \
+ GLuint len = strlen (source); \
+ if (!(dest = MALLOC (len+1))) { \
+ fprintf (stderr, "%s: %d: out of memory.\n", __FILE__, __LINE__); \
+ abort(); \
+ } \
+ memcpy (dest, source, len+1); \
+} while (0)
+
+static int compare (const void *a, const void *b) {
+ return strcmp (*(char *const*)a, *(char *const*)b);
+}
+/** \brief Binary search in a string array. */
+static GLuint bsearchStr (const XML_Char *name,
+ const XML_Char *elems[], GLuint count) {
+ const XML_Char **found;
+ found = bsearch (&name, elems, count, sizeof (XML_Char *), compare);
+ if (found)
+ return found - elems;
+ else
+ return count;
+}
+
+/** \brief Locale-independent integer parser.
+ *
+ * Works similar to strtol. Leading space is NOT skipped. The input
+ * number may have an optional sign. Radix is specified by base. If
+ * base is 0 then decimal is assumed unless the input number is
+ * prefixed by 0x or 0X for hexadecimal or 0 for octal. After
+ * returning tail points to the first character that is not part of
+ * the integer number. If no number was found then tail points to the
+ * start of the input string. */
+static GLint strToI (const XML_Char *string, const XML_Char **tail, int base) {
+ GLint radix = base == 0 ? 10 : base;
+ GLint result = 0;
+ GLint sign = 1;
+ GLboolean numberFound = GL_FALSE;
+ const XML_Char *start = string;
+
+ assert (radix >= 2 && radix <= 36);
+
+ if (*string == '-') {
+ sign = -1;
+ string++;
+ } else if (*string == '+')
+ string++;
+ if (base == 0 && *string == '0') {
+ numberFound = GL_TRUE;
+ if (*(string+1) == 'x' || *(string+1) == 'X') {
+ radix = 16;
+ string += 2;
+ } else {
+ radix = 8;
+ string++;
+ }
+ }
+ do {
+ GLint digit = -1;
+ if (radix <= 10) {
+ if (*string >= '0' && *string < '0' + radix)
+ digit = *string - '0';
+ } else {
+ if (*string >= '0' && *string <= '9')
+ digit = *string - '0';
+ else if (*string >= 'a' && *string < 'a' + radix - 10)
+ digit = *string - 'a' + 10;
+ else if (*string >= 'A' && *string < 'A' + radix - 10)
+ digit = *string - 'A' + 10;
+ }
+ if (digit != -1) {
+ numberFound = GL_TRUE;
+ result = radix*result + digit;
+ string++;
+ } else
+ break;
+ } while (GL_TRUE);
+ *tail = numberFound ? string : start;
+ return sign * result;
+}
+
+/** \brief Locale-independent floating-point parser.
+ *
+ * Works similar to strtod. Leading space is NOT skipped. The input
+ * number may have an optional sign. '.' is interpreted as decimal
+ * point and may occor at most once. Optionally the number may end in
+ * [eE]<exponent>, where <exponent> is an integer as recognized by
+ * strToI. In that case the result is number * 10^exponent. After
+ * returning tail points to the first character that is not part of
+ * the floating point number. If no number was found then tail points
+ * to the start of the input string.
+ *
+ * Uses two passes for maximum accuracy. */
+static GLfloat strToF (const XML_Char *string, const XML_Char **tail) {
+ GLint nDigits = 0, pointPos, exponent;
+ GLfloat sign = 1.0f, result = 0.0f, scale;
+ const XML_Char *start = string, *numStart;
+
+ /* sign */
+ if (*string == '-') {
+ sign = -1.0f;
+ string++;
+ } else if (*string == '+')
+ string++;
+
+ /* first pass: determine position of decimal point, number of
+ * digits, exponent and the end of the number. */
+ numStart = string;
+ while (*string >= '0' && *string <= '9') {
+ string++;
+ nDigits++;
+ }
+ pointPos = nDigits;
+ if (*string == '.') {
+ string++;
+ while (*string >= '0' && *string <= '9') {
+ string++;
+ nDigits++;
+ }
+ }
+ if (nDigits == 0) {
+ /* no digits, no number */
+ *tail = start;
+ return 0.0f;
+ }
+ *tail = string;
+ if (*string == 'e' || *string == 'E') {
+ const XML_Char *expTail;
+ exponent = strToI (string+1, &expTail, 10);
+ if (expTail == string+1)
+ exponent = 0;
+ else
+ *tail = expTail;
+ } else
+ exponent = 0;
+ string = numStart;
+
+ /* scale of the first digit */
+ scale = sign * (GLfloat)pow (10.0, (GLdouble)(pointPos-1 + exponent));
+
+ /* second pass: parse digits */
+ do {
+ if (*string != '.') {
+ assert (*string >= '0' && *string <= '9');
+ result += scale * (GLfloat)(*string - '0');
+ scale *= 0.1f;
+ nDigits--;
+ }
+ string++;
+ } while (nDigits > 0);
+
+ return result;
+}
+
+/** \brief Parse a value of a given type. */
+static GLboolean parseValue (driOptionValue *v, driOptionType type,
+ const XML_Char *string) {
+ const XML_Char *tail;
+ /* skip leading white-space */
+ string += strspn (string, " \f\n\r\t\v");
+ switch (type) {
+ case DRI_BOOL:
+ if (!strcmp (string, "false")) {
+ v->_bool = GL_FALSE;
+ tail = string + 5;
+ } else if (!strcmp (string, "true")) {
+ v->_bool = GL_TRUE;
+ tail = string + 4;
+ }
+ else
+ return GL_FALSE;
+ break;
+ case DRI_ENUM: /* enum is just a special integer */
+ case DRI_INT:
+ v->_int = strToI (string, &tail, 0);
+ break;
+ case DRI_FLOAT:
+ v->_float = strToF (string, &tail);
+ break;
+ }
+
+ if (tail == string)
+ return GL_FALSE; /* empty string (or containing only white-space) */
+ /* skip trailing white space */
+ if (*tail)
+ tail += strspn (tail, " \f\n\r\t\v");
+ if (*tail)
+ return GL_FALSE; /* something left over that is not part of value */
+
+ return GL_TRUE;
+}
+
+/** \brief Parse a list of ranges of type info->type. */
+static GLboolean parseRanges (driOptionInfo *info, const XML_Char *string) {
+ XML_Char *cp, *range;
+ GLuint nRanges, i;
+ driOptionRange *ranges;
+
+ XSTRDUP (cp, string);
+ /* pass 1: determine the number of ranges (number of commas + 1) */
+ range = cp;
+ for (nRanges = 1; *range; ++range)
+ if (*range == ',')
+ ++nRanges;
+
+ if ((ranges = MALLOC (nRanges*sizeof(driOptionRange))) == NULL) {
+ fprintf (stderr, "%s: %d: out of memory.\n", __FILE__, __LINE__);
+ abort();
+ }
+
+ /* pass 2: parse all ranges into preallocated array */
+ range = cp;
+ for (i = 0; i < nRanges; ++i) {
+ XML_Char *end, *sep;
+ assert (range);
+ end = strchr (range, ',');
+ if (end)
+ *end = '\0';
+ sep = strchr (range, ':');
+ if (sep) { /* non-empty interval */
+ *sep = '\0';
+ if (!parseValue (&ranges[i].start, info->type, range) ||
+ !parseValue (&ranges[i].end, info->type, sep+1))
+ break;
+ if (info->type == DRI_INT &&
+ ranges[i].start._int > ranges[i].end._int)
+ break;
+ if (info->type == DRI_FLOAT &&
+ ranges[i].start._float > ranges[i].end._float)
+ break;
+ } else { /* empty interval */
+ if (!parseValue (&ranges[i].start, info->type, range))
+ break;
+ ranges[i].end = ranges[i].start;
+ }
+ if (end)
+ range = end+1;
+ else
+ range = NULL;
+ }
+ FREE (cp);
+ if (i < nRanges) {
+ FREE (ranges);
+ return GL_FALSE;
+ } else
+ assert (range == NULL);
+
+ info->nRanges = nRanges;
+ info->ranges = ranges;
+ return GL_TRUE;
+}
+
+/** \brief Check if a value is in one of info->ranges. */
+static GLboolean checkValue (const driOptionValue *v, const driOptionInfo *info) {
+ GLuint i;
+ assert (info->type != DRI_BOOL); /* should be caught by the parser */
+ if (info->nRanges == 0)
+ return GL_TRUE;
+ switch (info->type) {
+ case DRI_ENUM: /* enum is just a special integer */
+ case DRI_INT:
+ for (i = 0; i < info->nRanges; ++i)
+ if (v->_int >= info->ranges[i].start._int &&
+ v->_int <= info->ranges[i].end._int)
+ return GL_TRUE;
+ break;
+ case DRI_FLOAT:
+ for (i = 0; i < info->nRanges; ++i)
+ if (v->_float >= info->ranges[i].start._float &&
+ v->_float <= info->ranges[i].end._float)
+ return GL_TRUE;
+ break;
+ default:
+ assert (0); /* should never happen */
+ }
+ return GL_FALSE;
+}
+
+/** \brief Output a warning message. */
+#define XML_WARNING1(msg) do {\
+ __driUtilMessage ("Warning in %s line %d, column %d: "msg, data->name, \
+ XML_GetCurrentLineNumber(data->parser), \
+ XML_GetCurrentColumnNumber(data->parser)); \
+} while (0)
+#define XML_WARNING(msg,args...) do { \
+ __driUtilMessage ("Warning in %s line %d, column %d: "msg, data->name, \
+ XML_GetCurrentLineNumber(data->parser), \
+ XML_GetCurrentColumnNumber(data->parser), \
+ args); \
+} while (0)
+/** \brief Output an error message. */
+#define XML_ERROR1(msg) do { \
+ __driUtilMessage ("Error in %s line %d, column %d: "msg, data->name, \
+ XML_GetCurrentLineNumber(data->parser), \
+ XML_GetCurrentColumnNumber(data->parser)); \
+} while (0)
+#define XML_ERROR(msg,args...) do { \
+ __driUtilMessage ("Error in %s line %d, column %d: "msg, data->name, \
+ XML_GetCurrentLineNumber(data->parser), \
+ XML_GetCurrentColumnNumber(data->parser), \
+ args); \
+} while (0)
+/** \brief Output a fatal error message and abort. */
+#define XML_FATAL1(msg) do { \
+ fprintf (stderr, "Fatal error in %s line %d, column %d: "msg"\n", \
+ data->name, \
+ XML_GetCurrentLineNumber(data->parser), \
+ XML_GetCurrentColumnNumber(data->parser)); \
+ abort();\
+} while (0)
+#define XML_FATAL(msg,args...) do { \
+ fprintf (stderr, "Fatal error in %s line %d, column %d: "msg"\n", \
+ data->name, \
+ XML_GetCurrentLineNumber(data->parser), \
+ XML_GetCurrentColumnNumber(data->parser), \
+ args); \
+ abort();\
+} while (0)
+
+/** \brief Parser context for __driConfigOptions. */
+struct OptInfoData {
+ const char *name;
+ XML_Parser parser;
+ driOptionCache *cache;
+ GLboolean inDriInfo;
+ GLboolean inSection;
+ GLboolean inDesc;
+ GLboolean inOption;
+ GLboolean inEnum;
+ int curOption;
+};
+
+/** \brief Elements in __driConfigOptions. */
+enum OptInfoElem {
+ OI_DESCRIPTION = 0, OI_DRIINFO, OI_ENUM, OI_OPTION, OI_SECTION, OI_COUNT
+};
+static const XML_Char *OptInfoElems[] = {
+ "description", "driinfo", "enum", "option", "section"
+};
+
+/** \brief Parse attributes of an enum element.
+ *
+ * We're not actually interested in the data. Just make sure this is ok
+ * for external configuration tools.
+ */
+static void parseEnumAttr (struct OptInfoData *data, const XML_Char **attr) {
+ GLuint i;
+ const XML_Char *value = NULL, *text = NULL;
+ driOptionValue v;
+ GLuint opt = data->curOption;
+ for (i = 0; attr[i]; i += 2) {
+ if (!strcmp (attr[i], "value")) value = attr[i+1];
+ else if (!strcmp (attr[i], "text")) text = attr[i+1];
+ else XML_FATAL("illegal enum attribute: %s.", attr[i]);
+ }
+ if (!value) XML_FATAL1 ("value attribute missing in enum.");
+ if (!text) XML_FATAL1 ("text attribute missing in enum.");
+ if (!parseValue (&v, data->cache->info[opt].type, value))
+ XML_FATAL ("illegal enum value: %s.", value);
+ if (!checkValue (&v, &data->cache->info[opt]))
+ XML_FATAL ("enum value out of valid range: %s.", value);
+}
+
+/** \brief Parse attributes of a description element.
+ *
+ * We're not actually interested in the data. Just make sure this is ok
+ * for external configuration tools.
+ */
+static void parseDescAttr (struct OptInfoData *data, const XML_Char **attr) {
+ GLuint i;
+ const XML_Char *lang = NULL, *text = NULL;
+ for (i = 0; attr[i]; i += 2) {
+ if (!strcmp (attr[i], "lang")) lang = attr[i+1];
+ else if (!strcmp (attr[i], "text")) text = attr[i+1];
+ else XML_FATAL("illegal description attribute: %s.", attr[i]);
+ }
+ if (!lang) XML_FATAL1 ("lang attribute missing in description.");
+ if (!text) XML_FATAL1 ("text attribute missing in description.");
+}
+
+/** \brief Parse attributes of an option element. */
+static void parseOptInfoAttr (struct OptInfoData *data, const XML_Char **attr) {
+ enum OptAttr {OA_DEFAULT = 0, OA_NAME, OA_TYPE, OA_VALID, OA_COUNT};
+ static const XML_Char *optAttr[] = {"default", "name", "type", "valid"};
+ const XML_Char *attrVal[OA_COUNT] = {NULL, NULL, NULL, NULL};
+ const char *defaultVal;
+ driOptionCache *cache = data->cache;
+ GLuint opt, i;
+ for (i = 0; attr[i]; i += 2) {
+ GLuint attrName = bsearchStr (attr[i], optAttr, OA_COUNT);
+ if (attrName >= OA_COUNT)
+ XML_FATAL ("illegal option attribute: %s", attr[i]);
+ attrVal[attrName] = attr[i+1];
+ }
+ if (!attrVal[OA_NAME]) XML_FATAL1 ("name attribute missing in option.");
+ if (!attrVal[OA_TYPE]) XML_FATAL1 ("type attribute missing in option.");
+ if (!attrVal[OA_DEFAULT]) XML_FATAL1 ("default attribute missing in option.");
+
+ opt = findOption (cache, attrVal[OA_NAME]);
+ if (cache->info[opt].name)
+ XML_FATAL ("option %s redefined.", attrVal[OA_NAME]);
+ data->curOption = opt;
+
+ XSTRDUP (cache->info[opt].name, attrVal[OA_NAME]);
+
+ if (!strcmp (attrVal[OA_TYPE], "bool"))
+ cache->info[opt].type = DRI_BOOL;
+ else if (!strcmp (attrVal[OA_TYPE], "enum"))
+ cache->info[opt].type = DRI_ENUM;
+ else if (!strcmp (attrVal[OA_TYPE], "int"))
+ cache->info[opt].type = DRI_INT;
+ else if (!strcmp (attrVal[OA_TYPE], "float"))
+ cache->info[opt].type = DRI_FLOAT;
+ else
+ XML_FATAL ("illegal type in option: %s.", attrVal[OA_TYPE]);
+
+ defaultVal = getenv (cache->info[opt].name);
+ if (defaultVal != NULL) {
+ /* don't use XML_WARNING, we want the user to see this! */
+ fprintf (stderr,
+ "ATTENTION: default value of option %s overridden by environment.\n",
+ cache->info[opt].name);
+ } else
+ defaultVal = attrVal[OA_DEFAULT];
+ if (!parseValue (&cache->values[opt], cache->info[opt].type, defaultVal))
+ XML_FATAL ("illegal default value: %s.", defaultVal);
+
+ if (attrVal[OA_VALID]) {
+ if (cache->info[opt].type == DRI_BOOL)
+ XML_FATAL1 ("boolean option with valid attribute.");
+ if (!parseRanges (&cache->info[opt], attrVal[OA_VALID]))
+ XML_FATAL ("illegal valid attribute: %s.", attrVal[OA_VALID]);
+ if (!checkValue (&cache->values[opt], &cache->info[opt]))
+ XML_FATAL ("default value out of valid range '%s': %s.",
+ attrVal[OA_VALID], defaultVal);
+ } else if (cache->info[opt].type == DRI_ENUM) {
+ XML_FATAL1 ("valid attribute missing in option (mandatory for enums).");
+ } else {
+ cache->info[opt].nRanges = 0;
+ cache->info[opt].ranges = NULL;
+ }
+}
+
+/** \brief Handler for start element events. */
+static void optInfoStartElem (void *userData, const XML_Char *name,
+ const XML_Char **attr) {
+ struct OptInfoData *data = (struct OptInfoData *)userData;
+ enum OptInfoElem elem = bsearchStr (name, OptInfoElems, OI_COUNT);
+ switch (elem) {
+ case OI_DRIINFO:
+ if (data->inDriInfo)
+ XML_FATAL1 ("nested <driinfo> elements.");
+ if (attr[0])
+ XML_FATAL1 ("attributes specified on <driinfo> element.");
+ data->inDriInfo = GL_TRUE;
+ break;
+ case OI_SECTION:
+ if (!data->inDriInfo)
+ XML_FATAL1 ("<section> must be inside <driinfo>.");
+ if (data->inSection)
+ XML_FATAL1 ("nested <section> elements.");
+ if (attr[0])
+ XML_FATAL1 ("attributes specified on <section> element.");
+ data->inSection = GL_TRUE;
+ break;
+ case OI_DESCRIPTION:
+ if (!data->inSection && !data->inOption)
+ XML_FATAL1 ("<description> must be inside <description> or <option.");
+ if (data->inDesc)
+ XML_FATAL1 ("nested <description> elements.");
+ data->inDesc = GL_TRUE;
+ parseDescAttr (data, attr);
+ break;
+ case OI_OPTION:
+ if (!data->inSection)
+ XML_FATAL1 ("<option> must be inside <section>.");
+ if (data->inDesc)
+ XML_FATAL1 ("<option> nested in <description> element.");
+ if (data->inOption)
+ XML_FATAL1 ("nested <option> elements.");
+ data->inOption = GL_TRUE;
+ parseOptInfoAttr (data, attr);
+ break;
+ case OI_ENUM:
+ if (!(data->inOption && data->inDesc))
+ XML_FATAL1 ("<enum> must be inside <option> and <description>.");
+ if (data->inEnum)
+ XML_FATAL1 ("nested <enum> elements.");
+ data->inEnum = GL_TRUE;
+ parseEnumAttr (data, attr);
+ break;
+ default:
+ XML_FATAL ("unknown element: %s.", name);
+ }
+}
+
+/** \brief Handler for end element events. */
+static void optInfoEndElem (void *userData, const XML_Char *name) {
+ struct OptInfoData *data = (struct OptInfoData *)userData;
+ enum OptInfoElem elem = bsearchStr (name, OptInfoElems, OI_COUNT);
+ switch (elem) {
+ case OI_DRIINFO:
+ data->inDriInfo = GL_FALSE;
+ break;
+ case OI_SECTION:
+ data->inSection = GL_FALSE;
+ break;
+ case OI_DESCRIPTION:
+ data->inDesc = GL_FALSE;
+ break;
+ case OI_OPTION:
+ data->inOption = GL_FALSE;
+ break;
+ case OI_ENUM:
+ data->inEnum = GL_FALSE;
+ break;
+ default:
+ assert (0); /* should have been caught by StartElem */
+ }
+}
+
+void driParseOptionInfo (driOptionCache *info,
+ const char *configOptions, GLuint nConfigOptions) {
+ XML_Parser p;
+ int status;
+ struct OptInfoData userData;
+ struct OptInfoData *data = &userData;
+ GLuint realNoptions;
+
+ /* determine hash table size and allocate memory:
+ * 3/2 of the number of options, rounded up, so there remains always
+ * at least one free entry. This is needed for detecting undefined
+ * options in configuration files without getting a hash table overflow.
+ * Round this up to a power of two. */
+ GLuint minSize = (nConfigOptions*3 + 1) / 2;
+ GLuint size, log2size;
+ for (size = 1, log2size = 0; size < minSize; size <<= 1, ++log2size);
+ info->tableSize = log2size;
+ info->info = CALLOC (size * sizeof (driOptionInfo));
+ info->values = CALLOC (size * sizeof (driOptionValue));
+ if (info->info == NULL || info->values == NULL) {
+ fprintf (stderr, "%s: %d: out of memory.\n", __FILE__, __LINE__);
+ abort();
+ }
+
+ p = XML_ParserCreate ("UTF-8"); /* always UTF-8 */
+ XML_SetElementHandler (p, optInfoStartElem, optInfoEndElem);
+ XML_SetUserData (p, data);
+
+ userData.name = "__driConfigOptions";
+ userData.parser = p;
+ userData.cache = info;
+ userData.inDriInfo = GL_FALSE;
+ userData.inSection = GL_FALSE;
+ userData.inDesc = GL_FALSE;
+ userData.inOption = GL_FALSE;
+ userData.inEnum = GL_FALSE;
+ userData.curOption = -1;
+
+ status = XML_Parse (p, configOptions, strlen (configOptions), 1);
+ if (!status)
+ XML_FATAL ("%s.", XML_ErrorString(XML_GetErrorCode(p)));
+
+ XML_ParserFree (p);
+
+ /* Check if the actual number of options matches nConfigOptions.
+ * A mismatch is not fatal (a hash table overflow would be) but we
+ * want the driver developer's attention anyway. */
+ realNoptions = countOptions (info);
+ if (realNoptions != nConfigOptions) {
+ fprintf (stderr,
+ "Error: nConfigOptions (%u) does not match the actual number of options in\n"
+ " __driConfigOptions (%u).\n",
+ nConfigOptions, realNoptions);
+ }
+}
+
+/** \brief Parser context for configuration files. */
+struct OptConfData {
+ const char *name;
+ XML_Parser parser;
+ driOptionCache *cache;
+ GLint screenNum;
+ const char *driverName, *execName;
+ GLuint ignoringDevice;
+ GLuint ignoringApp;
+ GLuint inDriConf;
+ GLuint inDevice;
+ GLuint inApp;
+ GLuint inOption;
+};
+
+/** \brief Elements in configuration files. */
+enum OptConfElem {
+ OC_APPLICATION = 0, OC_DEVICE, OC_DRICONF, OC_OPTION, OC_COUNT
+};
+static const XML_Char *OptConfElems[] = {
+ "application", "device", "driconf", "option"
+};
+
+/** \brief Parse attributes of a device element. */
+static void parseDeviceAttr (struct OptConfData *data, const XML_Char **attr) {
+ GLuint i;
+ const XML_Char *driver = NULL, *screen = NULL;
+ for (i = 0; attr[i]; i += 2) {
+ if (!strcmp (attr[i], "driver")) driver = attr[i+1];
+ else if (!strcmp (attr[i], "screen")) screen = attr[i+1];
+ else XML_WARNING("unkown device attribute: %s.", attr[i]);
+ }
+ if (driver && strcmp (driver, data->driverName))
+ data->ignoringDevice = data->inDevice;
+ else if (screen) {
+ driOptionValue screenNum;
+ if (!parseValue (&screenNum, DRI_INT, screen))
+ XML_WARNING("illegal screen number: %s.", screen);
+ else if (screenNum._int != data->screenNum)
+ data->ignoringDevice = data->inDevice;
+ }
+}
+
+/** \brief Parse attributes of an application element. */
+static void parseAppAttr (struct OptConfData *data, const XML_Char **attr) {
+ GLuint i;
+ const XML_Char *name = NULL, *exec = NULL;
+ for (i = 0; attr[i]; i += 2) {
+ if (!strcmp (attr[i], "name")) name = attr[i+1];
+ else if (!strcmp (attr[i], "executable")) exec = attr[i+1];
+ else XML_WARNING("unkown application attribute: %s.", attr[i]);
+ }
+ if (exec && strcmp (exec, data->execName))
+ data->ignoringApp = data->inApp;
+}
+
+/** \brief Parse attributes of an option element. */
+static void parseOptConfAttr (struct OptConfData *data, const XML_Char **attr) {
+ GLuint i;
+ const XML_Char *name = NULL, *value = NULL;
+ for (i = 0; attr[i]; i += 2) {
+ if (!strcmp (attr[i], "name")) name = attr[i+1];
+ else if (!strcmp (attr[i], "value")) value = attr[i+1];
+ else XML_WARNING("unkown option attribute: %s.", attr[i]);
+ }
+ if (!name) XML_WARNING1 ("name attribute missing in option.");
+ if (!value) XML_WARNING1 ("value attribute missing in option.");
+ if (name && value) {
+ driOptionCache *cache = data->cache;
+ GLuint opt = findOption (cache, name);
+ if (cache->info[opt].name == NULL)
+ XML_WARNING ("undefined option: %s.", name);
+ else if (getenv (cache->info[opt].name))
+ /* don't use XML_WARNING, we want the user to see this! */
+ fprintf (stderr, "ATTENTION: option value of option %s ignored.\n",
+ cache->info[opt].name);
+ else if (!parseValue (&cache->values[opt], cache->info[opt].type, value))
+ XML_WARNING ("illegal option value: %s.", value);
+ }
+}
+
+/** \brief Handler for start element events. */
+static void optConfStartElem (void *userData, const XML_Char *name,
+ const XML_Char **attr) {
+ struct OptConfData *data = (struct OptConfData *)userData;
+ enum OptConfElem elem = bsearchStr (name, OptConfElems, OC_COUNT);
+ switch (elem) {
+ case OC_DRICONF:
+ if (data->inDriConf)
+ XML_WARNING1 ("nested <driconf> elements.");
+ if (attr[0])
+ XML_WARNING1 ("attributes specified on <driconf> element.");
+ data->inDriConf++;
+ break;
+ case OC_DEVICE:
+ if (!data->inDriConf)
+ XML_WARNING1 ("<device> should be inside <driconf>.");
+ if (data->inDevice)
+ XML_WARNING1 ("nested <device> elements.");
+ data->inDevice++;
+ if (!data->ignoringDevice && !data->ignoringApp)
+ parseDeviceAttr (data, attr);
+ break;
+ case OC_APPLICATION:
+ if (!data->inDevice)
+ XML_WARNING1 ("<application> should be inside <device>.");
+ if (data->inApp)
+ XML_WARNING1 ("nested <application> elements.");
+ data->inApp++;
+ if (!data->ignoringDevice && !data->ignoringApp)
+ parseAppAttr (data, attr);
+ break;
+ case OC_OPTION:
+ if (!data->inApp)
+ XML_WARNING1 ("<option> should be inside <application>.");
+ if (data->inOption)
+ XML_WARNING1 ("nested <option> elements.");
+ data->inOption++;
+ if (!data->ignoringDevice && !data->ignoringApp)
+ parseOptConfAttr (data, attr);
+ break;
+ default:
+ XML_WARNING ("unknown element: %s.", name);
+ }
+}
+
+/** \brief Handler for end element events. */
+static void optConfEndElem (void *userData, const XML_Char *name) {
+ struct OptConfData *data = (struct OptConfData *)userData;
+ enum OptConfElem elem = bsearchStr (name, OptConfElems, OC_COUNT);
+ switch (elem) {
+ case OC_DRICONF:
+ data->inDriConf--;
+ break;
+ case OC_DEVICE:
+ if (data->inDevice-- == data->ignoringDevice)
+ data->ignoringDevice = 0;
+ break;
+ case OC_APPLICATION:
+ if (data->inApp-- == data->ignoringApp)
+ data->ignoringApp = 0;
+ break;
+ case OC_OPTION:
+ data->inOption--;
+ break;
+ default:
+ /* unknown element, warning was produced on start tag */;
+ }
+}
+
+/** \brief Initialize an option cache based on info */
+static void initOptionCache (driOptionCache *cache, const driOptionCache *info) {
+ cache->info = info->info;
+ cache->tableSize = info->tableSize;
+ cache->values = MALLOC ((1<<info->tableSize) * sizeof (driOptionValue));
+ if (cache->values == NULL) {
+ fprintf (stderr, "%s: %d: out of memory.\n", __FILE__, __LINE__);
+ abort();
+ }
+ memcpy (cache->values, info->values,
+ (1<<info->tableSize) * sizeof (driOptionValue));
+}
+
+/** \brief Parse the named configuration file */
+static void parseOneConfigFile (XML_Parser p) {
+#define BUF_SIZE 0x1000
+ struct OptConfData *data = (struct OptConfData *)XML_GetUserData (p);
+ int status;
+ int fd;
+
+ if ((fd = open (data->name, O_RDONLY)) == -1) {
+ __driUtilMessage ("Can't open configuration file %s: %s.",
+ data->name, strerror (errno));
+ return;
+ }
+
+ while (1) {
+ int bytesRead;
+ void *buffer = XML_GetBuffer (p, BUF_SIZE);
+ if (!buffer) {
+ __driUtilMessage ("Can't allocate parser buffer.");
+ break;
+ }
+ bytesRead = read (fd, buffer, BUF_SIZE);
+ if (bytesRead == -1) {
+ __driUtilMessage ("Error reading from configuration file %s: %s.",
+ data->name, strerror (errno));
+ break;
+ }
+ status = XML_ParseBuffer (p, bytesRead, bytesRead == 0);
+ if (!status) {
+ XML_ERROR ("%s.", XML_ErrorString(XML_GetErrorCode(p)));
+ break;
+ }
+ if (bytesRead == 0)
+ break;
+ }
+
+ close (fd);
+#undef BUF_SIZE
+}
+
+void driParseConfigFiles (driOptionCache *cache, const driOptionCache *info,
+ GLint screenNum, const char *driverName) {
+ char *filenames[2] = {"/etc/drirc", NULL};
+ char *home;
+ GLuint i;
+ struct OptConfData userData;
+
+ initOptionCache (cache, info);
+
+ userData.cache = cache;
+ userData.screenNum = screenNum;
+ userData.driverName = driverName;
+ userData.execName = GET_PROGRAM_NAME();
+
+ if ((home = getenv ("HOME"))) {
+ GLuint len = strlen (home);
+ filenames[1] = MALLOC (len + 7+1);
+ if (filenames[1] == NULL)
+ __driUtilMessage ("Can't allocate memory for %s/.drirc.", home);
+ else {
+ memcpy (filenames[1], home, len);
+ memcpy (filenames[1] + len, "/.drirc", 7+1);
+ }
+ }
+
+ for (i = 0; i < 2; ++i) {
+ XML_Parser p;
+ if (filenames[i] == NULL)
+ continue;
+
+ p = XML_ParserCreate (NULL); /* use encoding specified by file */
+ XML_SetElementHandler (p, optConfStartElem, optConfEndElem);
+ XML_SetUserData (p, &userData);
+ userData.parser = p;
+ userData.name = filenames[i];
+ userData.ignoringDevice = 0;
+ userData.ignoringApp = 0;
+ userData.inDriConf = 0;
+ userData.inDevice = 0;
+ userData.inApp = 0;
+ userData.inOption = 0;
+
+ parseOneConfigFile (p);
+ XML_ParserFree (p);
+ }
+
+ if (filenames[1])
+ FREE (filenames[1]);
+}
+
+void driDestroyOptionInfo (driOptionCache *info) {
+ driDestroyOptionCache (info);
+ if (info->info) {
+ GLuint i, size = 1 << info->tableSize;
+ for (i = 0; i < size; ++i) {
+ if (info->info[i].name) {
+ FREE (info->info[i].name);
+ if (info->info[i].ranges)
+ FREE (info->info[i].ranges);
+ }
+ }
+ FREE (info->info);
+ }
+}
+
+void driDestroyOptionCache (driOptionCache *cache) {
+ if (cache->values)
+ FREE (cache->values);
+}
+
+GLboolean driCheckOption (const driOptionCache *cache, const char *name,
+ driOptionType type) {
+ GLuint i = findOption (cache, name);
+ return cache->info[i].name != NULL && cache->info[i].type == type;
+}
+
+GLboolean driQueryOptionb (const driOptionCache *cache, const char *name) {
+ GLuint i = findOption (cache, name);
+ /* make sure the option is defined and has the correct type */
+ assert (cache->info[i].name != NULL);
+ assert (cache->info[i].type == DRI_BOOL);
+ return cache->values[i]._bool;
+}
+
+GLint driQueryOptioni (const driOptionCache *cache, const char *name) {
+ GLuint i = findOption (cache, name);
+ /* make sure the option is defined and has the correct type */
+ assert (cache->info[i].name != NULL);
+ assert (cache->info[i].type == DRI_INT || cache->info[i].type == DRI_ENUM);
+ return cache->values[i]._int;
+}
+
+GLfloat driQueryOptionf (const driOptionCache *cache, const char *name) {
+ GLuint i = findOption (cache, name);
+ /* make sure the option is defined and has the correct type */
+ assert (cache->info[i].name != NULL);
+ assert (cache->info[i].type == DRI_FLOAT);
+ return cache->values[i]._float;
+}